SMY 4-Wire PNP Harness for RBL w/Reverse / 4 Wire RBL - 2015-2021 Subaru WRX/STI
SMY 4-Wire PNP Harness for RBL w/Reverse / 4 Wire RBL - 2015-2021 Subaru WRX/STI
SMY
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PRODUCT DETAILS ▾
This harness speeds up the install process for the rear brake light kits with reverse light functions (4 wires only). This harness does not regulate light output or change the functions of the rear brake light.
Features:
- PNP harnesses prevent the need to splice into your OEM harness
- Speed up installation
Includes:
- 1 x PNP Harness
- 4 x Female Plug Connectors
PNP Wiring Guide:
- Black = Ground (-)
- Red = Brake Light (+)
- Orange = Parking Light / Running (+)
- White = Reverse (+)
Applications:
2015-2021 Subaru WRX
2015-2021 Subaru STI
WHY WE CARRY THIS ▾
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
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- Brand reputation matters — we favor proven manufacturing
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WHAT TO EXPECT ▾
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
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Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
This harness speeds up the install process for the rear brake light kits with reverse light functions (4 wires only). This harness does not regulate light output or change the functions of the rear brake light.
Features:
- PNP harnesses prevent the need to splice into your OEM harness
- Speed up installation
Includes:
- 1 x PNP Harness
- 4 x Female Plug Connectors
PNP Wiring Guide:
- Black = Ground (-)
- Red = Brake Light (+)
- Orange = Parking Light / Running (+)
- White = Reverse (+)
Applications:
2015-2021 Subaru WRX
2015-2021 Subaru STI
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